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arXiv 1008.4576astro-ph.SR
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中红外AKARI/IRC巡天中的M矮星

M Dwarfs in the Mid-Infrared AKARI/IRC Sky Survey

John E. Gizis

摘要:

我们提供了AKARI-IRC点源目录中检测到的968个K5-M6矮星的样本。这些低质量恒星中的绝大多数在AKARI宽9微米(S9 W)滤波器中具有与模型光球相匹配的亮度。不匹配的双星被排除在外。热(200- 600 K)碎片盘可在该中红外滤光器中产生过量。我们讨论了五个M矮星,其中有可能是显着的,但需要独立的确认过剩。我们还讨论了使用L18 W过滤器的50次检测,并支持声称的斯皮策检测AT Mic周围的温暖碎片盘。我们还报告了一个以前未被识别的磁盘周围的金牛座T星。

英文摘要:

We present a sample of 968 K5-M6 dwarfs detected in the AKARI-IRC Point Source Catalog. The vast majority of these low-mass stars have brightnesses in the AKARI broad 9-micron (S9W) filter that match expectations of model photospheres. Mismatched double stars have been excluded. Hot (200-600K) debris disks can produce excesses in this mid-infrared filter. We discuss five M dwarfs which have excesses that may be significant but require independent confirmation. We also discuss 50 detections with the L18W filter, and support the claimed Spitzer detection of a warm debris disk around AT Mic. We also report a previously unrecognized disk around a T Tauri star.

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